Plug is one of the key deformation tools in cross piercing. Its function is turning a solid bar into a hollow bloom.
顶头是斜轧穿孔主要的变形工具之一，其作用是将实心管坯穿轧成一定壁厚的空心毛管。
Socked and plug are precision machined from solid bar stock.
母插座和公插头采用实心棒料精密制造。
Socked and plug are precision machined from solid bar stock.
母插座和公插头采用实心棒料精密制造。
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